annotate src/portaudio_20161030/SConstruct @ 83:ae30d91d2ffe

Replace these with versions built using an older toolset (so as to avoid ABI compatibilities when linking on Ubuntu 14.04 for packaging purposes)

import sys, os.path

def rsplit(toSplit, sub, max=-1):
    """ str.rsplit seems to have been introduced in 2.4 :( """
    l = []
    i = 0
    while i != max:
        try: idx = toSplit.rindex(sub)
        except ValueError: break

        toSplit, splitOff = toSplit[:idx], toSplit[idx + len(sub):]
        l.insert(0, splitOff)
        i += 1

    l.insert(0, toSplit)
    return l

sconsDir = os.path.join("build", "scons")
SConscript(os.path.join(sconsDir, "SConscript_common"))
Import("Platform", "Posix", "ApiVer")

# SConscript_opts exports PortAudio options
optsDict = SConscript(os.path.join(sconsDir, "SConscript_opts"))
optionsCache = os.path.join(sconsDir, "options.cache")   # Save options between runs in this cache
options = Options(optionsCache, args=ARGUMENTS)
for k in ("Installation Dirs", "Build Targets", "Host APIs", "Build Parameters", "Bindings"):
    options.AddOptions(*optsDict[k])
# Propagate options into environment
env = Environment(options=options)
# Save options for next run
options.Save(optionsCache, env)
# Generate help text for options
env.Help(options.GenerateHelpText(env))

buildDir = os.path.join("#", sconsDir, env["PLATFORM"])

# Determine parameters to build tools
if Platform in Posix:
    threadCFlags = ''
    if Platform != 'darwin':
        threadCFlags = "-pthread "
    baseLinkFlags = threadCFlags
    baseCxxFlags = baseCFlags = "-Wall -pedantic -pipe " + threadCFlags
    debugCxxFlags = debugCFlags = "-g"
    optCxxFlags = optCFlags  = "-O2"
env.Append(CCFLAGS = baseCFlags)
env.Append(CXXFLAGS = baseCxxFlags)
env.Append(LINKFLAGS = baseLinkFlags)
if env["enableDebug"]:
    env.AppendUnique(CCFLAGS=debugCFlags.split())
    env.AppendUnique(CXXFLAGS=debugCxxFlags.split())
if env["enableOptimize"]:
    env.AppendUnique(CCFLAGS=optCFlags.split())
    env.AppendUnique(CXXFLAGS=optCxxFlags.split())
if not env["enableAsserts"]:
    env.AppendUnique(CPPDEFINES=["-DNDEBUG"])
if env["customCFlags"]:
    env.Append(CCFLAGS=Split(env["customCFlags"]))
if env["customCxxFlags"]:
    env.Append(CXXFLAGS=Split(env["customCxxFlags"]))
if env["customLinkFlags"]:
    env.Append(LINKFLAGS=Split(env["customLinkFlags"]))

env.Append(CPPPATH=[os.path.join("#", "include"), "common"])

# Store all signatures in one file, otherwise .sconsign files will get installed along with our own files
env.SConsignFile(os.path.join(sconsDir, ".sconsign"))

env.SConscriptChdir(False)
sources, sharedLib, staticLib, tests, portEnv, hostApis = env.SConscript(os.path.join("src", "SConscript"),
        build_dir=buildDir, duplicate=False, exports=["env"])

if Platform in Posix:
    prefix = env["prefix"]
    includeDir = os.path.join(prefix, "include")
    libDir = os.path.join(prefix, "lib")
    env.Alias("install", includeDir)
    env.Alias("install", libDir)

    # pkg-config

    def installPkgconfig(env, target, source):
        tgt = str(target[0])
        src = str(source[0])
        f = open(src)
        try: txt = f.read()
        finally: f.close()
        txt = txt.replace("@prefix@", prefix)
        txt = txt.replace("@exec_prefix@", prefix)
        txt = txt.replace("@libdir@", libDir)
        txt = txt.replace("@includedir@", includeDir)
        txt = txt.replace("@LIBS@", " ".join(["-l%s" % l for l in portEnv["LIBS"]]))
        txt = txt.replace("@THREAD_CFLAGS@", threadCFlags)

        f = open(tgt, "w")
        try: f.write(txt)
        finally: f.close()

    pkgconfigTgt = "portaudio-%d.0.pc" % int(ApiVer.split(".", 1)[0])
    env.Command(os.path.join(libDir, "pkgconfig", pkgconfigTgt),
        os.path.join("#", pkgconfigTgt + ".in"), installPkgconfig)

# Default to None, since if the user disables all targets and no Default is set, all targets
# are built by default
env.Default(None)
if env["enableTests"]:
    env.Default(tests)
if env["enableShared"]:
    env.Default(sharedLib)

    if Platform in Posix:
        def symlink(env, target, source):
            trgt = str(target[0])
            src = str(source[0])

            if os.path.islink(trgt) or os.path.exists(trgt):
                os.remove(trgt)
            os.symlink(os.path.basename(src), trgt)

        major, minor, micro = [int(c) for c in ApiVer.split(".")]
        
        soFile = "%s.%s" % (os.path.basename(str(sharedLib[0])), ApiVer)
        env.InstallAs(target=os.path.join(libDir, soFile), source=sharedLib)
        # Install symlinks
        symTrgt = os.path.join(libDir, soFile)
        env.Command(os.path.join(libDir, "libportaudio.so.%d.%d" % (major, minor)),
            symTrgt, symlink)
        symTrgt = rsplit(symTrgt, ".", 1)[0]
        env.Command(os.path.join(libDir, "libportaudio.so.%d" % major), symTrgt, symlink)
        symTrgt = rsplit(symTrgt, ".", 1)[0]
        env.Command(os.path.join(libDir, "libportaudio.so"), symTrgt, symlink)

if env["enableStatic"]:
    env.Default(staticLib)
    env.Install(libDir, staticLib)

env.Install(includeDir, os.path.join("include", "portaudio.h"))


if env["enableCxx"]:
    env.SConscriptChdir(True)
    cxxEnv = env.Copy()
    sharedLibs, staticLibs, headers = env.SConscript(os.path.join("bindings", "cpp", "SConscript"),
            exports={"env": cxxEnv, "buildDir": buildDir}, build_dir=os.path.join(buildDir, "portaudiocpp"), duplicate=False)
    if env["enableStatic"]:
        env.Default(staticLibs)
        env.Install(libDir, staticLibs)
    if env["enableShared"]:
        env.Default(sharedLibs)
        env.Install(libDir, sharedLibs)
    env.Install(os.path.join(includeDir, "portaudiocpp"), headers)

# Generate portaudio_config.h header with compile-time definitions of which PA
# back-ends are available, and which includes back-end extension headers

# Host-specific headers
hostApiHeaders = {"ALSA": "pa_linux_alsa.h",
                    "ASIO": "pa_asio.h",
                    "COREAUDIO": "pa_mac_core.h",
                    "JACK": "pa_jack.h",
                    "WMME": "pa_winwmme.h",
                    }

def buildConfigH(target, source, env):
    """builder for portaudio_config.h"""
    global hostApiHeaders, hostApis
    out = ""
    for hostApi in hostApis:
        out += "#define PA_HAVE_%s\n" % hostApi

        hostApiSpecificHeader = hostApiHeaders.get(hostApi, None)
        if hostApiSpecificHeader:
            out += "#include \"%s\"\n" % hostApiSpecificHeader

        out += "\n"
    # Strip the last newline
    if out and out[-1] == "\n":
        out = out[:-1]

    f = file(str(target[0]), 'w')
    try: f.write(out)
    finally: f.close()
    return 0

# Define the builder for the config header
env.Append(BUILDERS={"portaudioConfig": env.Builder(
            action=Action(buildConfigH), target_factory=env.fs.File)})

confH = env.portaudioConfig(File("portaudio_config.h", "include"),
        File("portaudio.h", "include"))
env.Default(confH)
env.Install(os.path.join(includeDir, "portaudio"), confH)

for api in hostApis:
    if api in hostApiHeaders:
        env.Install(os.path.join(includeDir, "portaudio"),
                File(hostApiHeaders[api], "include"))